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Repair Strategies for Corroded Steel Bridge Girder End Regions

Mash, Jason Anthony (2022) Repair Strategies for Corroded Steel Bridge Girder End Regions. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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The objective of this research is to investigate practical in situ repair methods, using high performance and traditional materials, which can be applied to corroded and/or damaged steel girder ends. The focus of the study is on girder end repairs associated with corrosion and damage typically resulting from leaking deck joints. Resulting corrosion damage patterns may be exacerbated or mitigated by local details such as the presence of stiffeners or the nature of the bearing provided. Through an integrated analytical and experimental study, the existing capacity of archetypal corroded end regions was assessed. Techniques for providing in situ rehabilitation of these regions using both high performance and conventional means were explored. Six W24 girders were tested over short shear spans. The girders had significant deterioration including section loss on the web and holes (100% section loss) over the bearing region. For each girder, End A was tested under static load conditions to failure. If an acceptable result was achieved after testing End A, End B was fatigue conditioned for 1 million cycles and subsequently tested to failure in a similar manner to End A. Repair methods considered included conventional bolted steel repairs, ultra-high performance and normal strength reinforced concrete encasement and adhesively applied fiber-reinforced polymer (FRP) plates. All methods but FRP plates were able to restore the original, undeteriorated bearing and shear capacities of the girders. A nonlinear finite element model was developed for each repair method. These models clearly identified the transition of failure modes based on repair methods and identified the ability of stiffer bearing stiffeners to permit tension field action to develop in the girder end panels. Finally an extensive qualitative assessment of all repair methods considered is presented.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Mash, Jason Anthonyjam523@pitt.edujam5230000-0002-7023-078X
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairHarries,
Committee MemberBrigham,
Committee MemberAlavi,
Committee MemberHaight,
Date: 6 September 2022
Date Type: Publication
Defense Date: 16 May 2022
Approval Date: 6 September 2022
Submission Date: 19 May 2022
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 191
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Civil and Environmental Engineering
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: Bridge Repair Steel Bridge Repair Girder End Repair
Date Deposited: 06 Sep 2022 16:20
Last Modified: 06 Sep 2022 16:20


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